DE1864196U - VALVE WITH PRESSURE RELIEF. - Google Patents

Description

X ROOM 2 Ju IiN k BECiiKi. ΠΙ ^ ί ^ Ο ^ - ^^ ä ^ lfiv-i ^ & 2 ^^ F Ϊ

Valve with

The flow concerns -tin valve, whose valve cone voxu uas du> trösaead <s & medium is charged in the final direction «

With valves of this type, it is difficult to open the valve cone as a result of the pressure exerted on it. These difficulties are attempted to circumvent these difficulties in a well-known way by installing "a small-dimensioned prelift cone in the main valve, which, when opened, relieves the main valve cone by reducing the pressure differential in front of and behind the main valve cone"I> ie However, effect of such Vorhubkegel not always enough, "a lightweight Cffnea of Kauptventükegels to ensure" This eats primarily on Kurückauführen because dae etröinende by the Vorhubkegel medium ija allgeriiföineä is * no way a eo high bridge behind the i-iäuptventilkegel äuizubauen. carrdt the to open erioxdcrUcls. «low pressure difference is reached.

Öi «Lrfinduiig ν / ΐϊΐύ & η dit MÄn ^,« l ₄ the valves equipped with a pre-stroke cone were eliminated and an extensive statement of the valve was obtained, which in every case ensures easy opening of the valve

i-ifindungsgeixiliö is achieved by the fact that in the valve housing there is provided a cylinder space which is closed off by an axially movable piston, which is filled with the medium under bridging when the prelift cone is opened and the piston, which η-it the main valve cone in force There is a critical connection, applied in the direction of flow of the H & uptventilkegdL. Voiteilhaiterweise calibration is that only Daucktatlaetuiag de £ Hauptveiitilkegels serving cylinder space in fetopfbüchseeitigen area of the valve housing, "wherein the ivolbea forms with the main valve poppet an gesnaeiuaaixxes component, in a further embodiment of the invention, the valve seat IFCT dee Vorhubkegele in Hauptventiikegel arranged, seen in utröinungsrichtung, behind the Valve seat of the Vorhubkegele connection «- kaneie Äum cylinder space are provided. These channels are generally formed by.

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Zm. £. An almost complete relief with the smallest possible radial stretching of the piston is achieved after the vtntilsiti; of the main valve cone, a drop point is provided, with that of dear Broseeletelie and the & iteflächen dee; The main valve cone enclosed by the cadial bores provided in the valve cone is connected to the space behind the valve seat of the pre-stroke cone and the diameter of the main valve cone in the area of the biopsy area is approximately the same. chmeeeei- beeitat like aex flask in the Zjtlinderrauiii. By arranging the flow control mechanism behind the seat of the main valve cone, the further advantage is achieved that the valve timing areas are exposed to a slight difference in flow *

An embodiment of the invention is shown in the drawing:

The valve housing 1 with inlet flange 2 and outlet flange 3 carries the valve seat 4 and the armored throttle point 5. The main valve cone 6 is provided with an extension piece 7, on the upper end of which the actuator piston 8 is arranged. The valve seat 9 of the pre-stroke cone 10 formed by the spindle is arranged in the main valve cone 6. At isaum 11 below the prelift cone, there is pressure from the shut-off medium through bores 12. As soon as the pre-stroke cone is moved in the direction of Olinung by opening the spindle 13, the medium flows. In the barely 14 and from there the isutes 15 into the cylinder space 16 and acts on the power piston 8 in the opening direction of the main valve cone. At the same time, the space 17, which through the radial bores 18 is also connected to the bar 1 'behind the valve seat of the prelift cone, is placed under medium pressure. The main valve cone is thus depressurized except for its seat surfaces 19. The force acting on the valve seat surfaces can easily be overcome in the present embodiment.

Claims (1)

■ P ~ tsr-t ~ i? -N w4 κ. s ρ χ. ύ che 1. Valve with pre-stroke cone, the main valve cone of which depends on the medium pressure is charged in iichiiäilrichturig, characterized in that im Valve housing closed off by an axially movable piston Cylinder rauai provided itt, when opening the front hub cone of. the medium standing under leakage is filled and the liquid is wticaer is in force-bonded connection with the main valve cone » acted upon in the direction of the main valve cone. ΐ. Valve according to claim I, characterized in that the pressure relief The main valve cone serves the cylinder space on the stuffing box side Area of the - valve housing «is arranged. 3. Valve according to äen claims 1 and 2, characterized in that cer xtti cylinder space axi & movably arranged piston nut dexi ^ main valve cone c-in gt> »ü * iint & Eue6 component forms. 4. Valve according to claims 1 bie 3 or a oereelben Dadui ch gekenaaeichxitii that dex valve seat of the Vorhubkegels in the main valve poppet ar% etiidriet eats \ .vobei in ütrömungsiiehtunfe ge & around "det behind the Ventilsita Vorhubkegele Verbindungskanfil-e üuq Zylindei ramai. are seen before. 5. Valve according to claim 4, characterized in that the V he connection ε-cannula are formed by lim grooves provided in the spindle. 6. Valve according to the claims 1 bie Seder one of the same characterized. α &·> the Yorhubkegel forms a caeineaxnes S & eil xxAt of the valve spindle. ?, Valve after the i.naprvtchen I him 6 or one of the same through it characterized that after the valve seat dee Hauptventiikegele one Lroisseletelie is provided and that of the Droseelstelle and the Isitzfl-iLchen the Ba-uptvestilkegelc enclosed space, through in Main valve cone provided radially extending bores with the Aes pre-stroke cone is connected to the valve seat behind the valve seat. 8. Valve according to claim 7, characterized in that the main valve cone in the area of the throttle point has approximately the same diameter as the piston in the cylinder chamber.